CN1526137A - Drive level flow-field conditioning to reduce flow field turbulence - Google Patents
Drive level flow-field conditioning to reduce flow field turbulence Download PDFInfo
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- CN1526137A CN1526137A CNA018112293A CN01811229A CN1526137A CN 1526137 A CN1526137 A CN 1526137A CN A018112293 A CNA018112293 A CN A018112293A CN 01811229 A CN01811229 A CN 01811229A CN 1526137 A CN1526137 A CN 1526137A
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Abstract
A flow control device (120) for a data storage system to reduce flow induced vibration. The flow control device (120) includes a plurality of streamline flow passages (122) to reduce turbulent flow in a flow field along a disc surface. Thus, air flow induced by rotation of data discs is directed through the plurality of streamline flow passages (122) to reduce turbulence to limit excitation or vibration of the head (108) and suspension components.
Description
Invention field
The present invention relates to a kind of data storage device, specifically, the present invention relates to a kind of air draught field control device, in order to reduce along the turbulent flow in the disc surface air draught field.
Background of invention
Data storage device is stored in numerical information on the disc of one rotation.The read/write head of memory storage is being supported with sense data from disc or with among the writing data on disk with respect to the surface of rotation disc.Disc be rotated in disc surface near produced inlet air flow path or airflow field.For contiguous or press close to read, the sensing element of read/write head is carried on the air bearing sliding part to form read/write head.This air bearing sliding part is being supported with respect to disc surface by a suspension assembly that is coupled in the drive arm of driven unit.The air turbulence that is adjacent in the airflow field of air bearing sliding part or sliding part suspension place can make read/write head or sprung parts vibration.The shake frequency of pattern of humorous (being total to) that the vibration of read/write head or sprung parts can evoke or cause the read/write head suspension assembly, thereby the head and the dish between spacing modulation (variation) or cause that read/write head leaves the motion of track, these all will reduce the quality of read-write operation.The present invention is intended to solve these or other problems, and the way of the solution that had not proposed so far is provided.
Brief summary of the invention
The present invention relates to the air flow controller of data-storage system, in order to reduce or to reduce the vibrations that cause by air current flow.This air flow controller comprises that a plurality of fairshaped gas channels are to reduce flowing along the turbulent flow of disc surface in airflow field.These and all features and advantage as feature of the present invention become perfectly clear with being described in detail afterwards having read in conjunction with the accompanying drawings below.
The accompanying drawing summary
Fig. 1 is a stereographic map, there is shown the data-storage system that comprises air-flow control or regulating device.
Fig. 2-1 is the front elevation of embodiment of the air-flow door of an air flow controller.
Fig. 2-the 2nd is along the sectional view of the 2-2-2-2 line of the air-flow door embodiment front elevation among Fig. 2-1 intercepting.
Fig. 3-1 is the stereographic map of embodiment of the air-flow door of an air flow controller.
Fig. 3-the 2nd, the front elevation of the embodiment of the air-flow door of air flow controller among Fig. 3-1.
Fig. 3-the 3rd is along the sectional view of the 3-3-3-3 line intercepting of the embodiment of air-flow door among Fig. 3-2.
Fig. 4 is the synoptic diagram of embodiment of the air-flow door of an air flow controller.
Fig. 5 is the synoptic diagram of the embodiment of air-flow control or adjusting part, and it comprises the influent stream door that is used for reading-writing head assembly and goes out Liu Men.
Fig. 6-1 is the synoptic diagram of the embodiment of an air flow controller, and it comprises and is used for again a plurality of gas channels of steering current.
Fig. 6-the 2nd, the synoptic diagram of the gas channel of air flow controller among Fig. 6-1.
Fig. 7-the 1st, the synoptic diagram of the working condition of air flow controller among Fig. 6-1 and Fig. 6-2, airflow apparatus makes it to leave the read/write head suspension assembly to the inside guiding of air-flow.
Fig. 7-the 2nd, the synoptic diagram of the working condition of air flow controller among Fig. 6-1 and Fig. 6-2, airflow apparatus outwards guide air-flow and make it to leave the read/write head suspension assembly.
Fig. 8 is the synoptic diagram of an air-flow Control Component, and this assembly is used for controlling flowing of air-flow in the airflow field of contiguous disc group assembly disc.
Fig. 9 is the synoptic diagram of the embodiment of an air flow controller, and it is supported in the gap between the adjacent disc of disc group.
Figure 10 is the synoptic diagram of the embodiment of an air flow controller, and it is supported in the disc group in the gap between the adjacent disc.
Figure 11 is the synoptic diagram of the embodiment of an air flow controller, and it is supported in the gap between the adjacent disc in the disc group.
Figure 12 is the stereographic map of the air-flow Control Component of a disc group, and it comprises and being formed between the lock at the circumference isolated gas channel that directly makes progress.
Figure 13 is the schematic elevational view of the embodiment of Figure 12.
Example embodiment describes in detail
Fig. 1 is an embodiment of a data memory devices 100, and it comprises the spindle assemblies 102 of all discs 104 that a supporting can storing digital information.One reading-writing head assembly 106 a plurality of read/write heads 108 with respect to the surface bearing of all discs 104, in order to read information from all discs 104 or information is write all discs 104.This spindle assemblies 102 comprises a spindle driver 108 (only schematically illustrated among the figure), and it makes all discs 104 rotate to carry out read-write operation around a main axis 110.
The disc surface that is rotated in of all discs 104 has formed the air flow of air or airflow field shown in all arrows 112 among Fig. 1.This airflow or airflow field may be a kind of turbulent flow near reading-writing head assembly 106.Reading-writing head assembly 106 comprises read/write head 108, and it is supported by a resilient suspension assembly 114 that is coupled in the actuating arm 116 of drive block 118.Drive block 118 is driven by a voice coil motor 119 and carries out read/write operation with mobile reading-writing head assembly 106.The turbulent flow that is adjacent to reading-writing head assembly 106 can shake or vibrate sprung parts, actuating arm or read/write head 108.The vibration of read/write head and suspension assembly can cause the vibration of resonance mode and increase the modulation (variation) that read/write head leaves spacing between the motion of track and read/write head and the disc.
The present invention relates to the control or the regulating device of an airflow field that in Fig. 1, schematically shows, in order to reduce the turbulent flow of airflow field with piece 120.More particularly, the present invention relates to a kind of air flow controller 120, it can reduce the big whirlpool in the airflow field, to reduce read/write head and the sprung parts amplitude owing to the vibration of air-flow initiation.In the embodiment in figure 1, this air flow controller 120 comprises a plurality of streamlined gas channels 122.This airflow apparatus 120 is supported in the gas channel or airflow field on adjacent discs surface.This streamlined gas channel 122 has a constant cross-section area or a size, with the length along it is that air-flow provides first-class linear passage, make turbulent flow become air-flow smoothly, and provide the airflow field of a more stratiform at sprung parts and reduce the vibration of read/write head and sprung parts.In another embodiment, formed the gas channel of air flow regulator, this passage can inwardly or outwards guide air-flow and leave sprung parts, and this will be narrated below.
Fig. 2-1 and 2-2 are the embodiment of an air flow controller, and it comprises the air-flow door 124-1 near the airflow field that is bearing in the disc surface 126.As shown in the figure, air-flow door 124-1 forms cellular structure 130, and this air-flow door is supported in the top of disc surface 126.This cellular structure 130 forms a plurality of streamlined gas channel 122-1, and passage has a constant sectional dimension size flowing in order to air-flow that more laminar flow shape is provided along its length in airflow field.This streamlined gas channel 122-1 comprises an outlet 134-1 that an inlet 132-1 and separates with inlet 132-1 and at inlet 132-1 with export between the 134-1 and have constant sectional dimension shown in Fig. 2-2.Flow to inlet 132-1 and flow out along gas channel 122-1 by the turbulent flow of arrow 136 expression from outlet 134-1.
The turbulent air that flows through gas channel 122-1 has formed more multi-layered laminar flow when flowing out shown in arrow 138, thereby has reduced turbulent flow or the eddy current in the airflow field, thereby has reduced read/write head and sprung parts to be flowed by air (turbulent flow) and the vibration that causes.This gas flow controller has also reduced pressure and the speed that acts on suspender and the read/write head.The thickness 139 of air-flow door 124-1 has formed at inlet 132 and has exported the length of the gas channel 122-1 between 134.Design this thickness so that the length of one section gas channel to be provided, the length of this gas channel has reduced turbulent flow but can not produce because unacceptable the dragging the rotation disc that is produced of the shearing force between the interface of air-flow door 124-1 and rotation disc 104.The requirement that drags 108 pairs of power of meeting raising spindle driver between the interface.
Fig. 3-1 shows another air-flow door embodiment 124-2 that is made up of block structure 140 to Fig. 3-3.As shown in the figure, this block structure 140 comprises a plurality of gas channel 122-2 similarly, and they have an inlet 132-2 and outlet 134-2 (shown in Fig. 3-3) reduces the vibration that is caused by air-flow to regulate air-flow as previously mentioned.Can also adopt other air-flow door, and the embodiment of its application shown in being not limited to here.Specifically, in the embodiment shown in Fig. 3-1, the air-flow door is shown as comprising three exhaust stream door 122-2, and in Fig. 3-2 and Fig. 3-3, that illustrate is 4 exhaust stream door 122-2, yet the number of gas channel of the present invention is not limited to specific number.In an illustrated embodiment, the outside of block structure 140 comprises a plurality of interphase terminals 141, and the latter forms unlimited gas channel 122-2, and they are not sealed by plate or other structures.Thereby interphase terminal 141 has reduced the surface area of contiguous disc surface and has reduced the area that shearing force is applied to it thereby reduced above-mentioned dragging.
In another embodiment shown in Figure 4, air-flow door 124-3 is made up of an array or a plurality of pipeline 142.As shown in the figure, a plurality of pipelines 142 form a plurality of streamlined gas channel 122-3 and have an inlet 132-3 and 134-3 airflow in the airflow field is regulated in the description of another embodiment according to the front.
Air turbulence in the airflow field is near the increase reading-writing head assembly 106 is limited in the passage of reading-writing head assembly 106 because of air-flow among.Increased the vibration of suspender and reading-writing head assembly along the turbulent flow of reading-writing head assembly 106.Therefore, as shown in Figure 5, air-flow door recited above can be arranged in the upstream of airflow path of (being arranged on) airflow field reading-writing head assembly 106 reducing the air-flow whirlpool with the vibration of restriction reading-writing head assembly 106 (and not repeat run-out " NRRO "), and is arranged on the downstream of reading-writing head assembly 106 so that the turbulent flow of the air-flow that is limited by reading-writing head assembly 106 becomes laminar flow more smoothly.
As shown in Figure 5, one first airflow, 146 upstreams that are positioned at read/write head and suspension assembly of crossing the threshold, and airflow 148 downstreams that are positioned at reading-writing head assembly 106 of going out.Each airflow is crossed the threshold and is flowed out door 146,148 and comprises that all a plurality of foregoing streamlined gas channels 122 are to reduce turbulent flow.Airflow is crossed the threshold 146 upstreams that are positioned at reading-writing head assembly 106 reducing the turbulent flow to reading-writing head assembly 106, and airflow is gone out and 148 is positioned at the downstream of reading-writing head assembly 106 to be adjusted to the air-flow that reading-writing head assembly 106 limits or encourages.
As shown in Figure 5, airflow is crossed the threshold and is flowed out door 146,148 bases 150 (schematically being shown among the figure) with respect to disk drives and is being supported.Reading-writing head assembly 106 is being supported pivotly with respect to base 150, in order to (as shown in Figure 5) mobile read/write head 108 between with respect to an interior location of the internal diameter of disc 104 and external diameter 152,154 and an external position with data are read from the track of disc 104 or the track of writing data on disk among.In the embodiment shown in, airflow is crossed the threshold and is flowed out door 146,148 width 156 extends between the inside and outside pivot position of reading-writing head assembly 106, to provide airflow field control to reduce the vibration that is caused by air-flow to the read/write head that is bearing in pivotly between the interior external position as shown in Figure 5.Though Fig. 5 shows concrete inflow door 146 and flows out the arrangement of door 148, the present invention is not limited to inflow door shown in Figure 5 146 and flows out the such arrangement of door 148 when using.In addition, though there is shown the direction that is provided with that flows into door and flow out door 146,148, flow into door and flow out door 146,148 when using and be not limited to any specific direction or orientation, door also is not limited to any specific width.
In a further embodiment, air flow regulator provides air-flow guiding or the control of air current flow direction.At Fig. 6-1, among the embodiment shown in Fig. 6-2, airflow apparatus comprises an air-flow door 124-4, and it comprises a plurality of air-flow guide channel 122-4.Passage 122-4 has constant area of section or size and forms an angle or a flexure plane is arranged with control or change the flow direction of air-flow shown in arrow 158 by passage 122-4 between inlet 132-4 and outlet 134-4.Shown in Fig. 7-1, thus the upstream that air-flow door 124-4 can be positioned at read/write head and suspension assembly 106 with air-flow towards the inwardly guiding and leave suspension assembly and disturb suspender to reduce vibration that air-flow was caused of the internal diameter 152 of disc 104 to limit their.In another embodiment shown in Fig. 7-2, air-flow door 124-5 comprise angled or crooked passage with air-flow towards the outwards guiding and leave read/write head and suspension assembly and the interference of suspender assembly is reduced the vibration that air-flow causes of the external diameter 154 of disc with restriction.
The present invention can be used for the turbulent flow of disc group assembly with the control airflow field.Fig. 8 shows a disc group assembly, it comprises a plurality of disc 104-1 by a spindle assemblies 102 supportings, 104-2,104-3 and 104-4, this main shaft comprises a spindle hub 160, and disc is supported to such an extent that can be rotated around a main shaft axle 162 by bearing 164 (only schematically being illustrated among the figure).As shown in the figure, all discs 104 overlay on the hub 160 and are spaced apart and form a plurality of gaps 168 betwixt by all spacer 166.Provide control to airflow field with air-flow Control Component 170 in the gap 168 between all discs 104 of disc group, this air-flow Control Component 170 comprises an air-flow controll block 172, and its supports from what piece 172 extended to stack air-flow door 174.Stack air-flow door 174 comprise a plurality of foregoing streamlined gas channels with restriction read/write head and suspender by vibration that air-flow was caused.
Air-flow controll block 172 with respect to the base support of data storage device to be supported in stacks air-flow door 174 in the gap 168 between all discs 104.Air-flow Control Component 170 before with respect to the base 150 assembling disc groups of disk drives earlier and the disc group combine.In an illustrated embodiment, controll block 172 comprises second end 180 that first end 176 and of pony sill bottom 178 (only the schematically showing among the figure) of being fixed in disk drives is fixed with respect to disk drives base cover 182 (only schematically showing among the figure), so that vibration provides control to airflow field by the above.The air flow controller that is used for the lower disc surface of last disc surface of outside disc 104-1 and outside disc 104-4 can be directly coupled to the bottom 178 of base cover 182 and pony sill respectively.
In the embodiment shown in fig. 9, cellular structure 130 is supported in the gap 168 and is used for the lower surface of disc 104-1 and the air-flow door or the control device of disc 104-2 upper surface to form one.In the embodiment of Figure 10, air-flow door 124-6 comprises the many pipelines 142 that are bearing on the plate 184.This plate 184 is supported (for example in gap 168) with respect to all discs 104.In an illustrated embodiment, plate 184 is being supported first, second air-flow door section 186-1, and 186-2 thinks that the lower surface of first disc that stacks supporting mutually and the upper surface of second disc provide air flow regulator.Thereby this plate 184 forms one in the flow field blocks flowing and reducing air flow energy in the flow field and be reduced in vibration on suspender and the read/write head with the air that slows down.
In the embodiment shown in fig. 11, air-flow door 124-7 comprises by plate 190 supporting and extended from it fin 188 formed a plurality of gas channels 122.In an illustrated embodiment, plate 190 is supporting first and second air-flow door section 192-1, and 192-2 thinks that the lower surface of first disc that stacks mutually and be supported and the upper surface of second disc provide gas flow modulation.This plate 190 also limits gas channel and reduces turbulent energy, so that more laminar flow to be provided along the flow field.Though the structure of particular airflow device has been shown, specific embodiment and the arrangement shown in when using, being not limited in Fig. 9 to Figure 11.
Figure 12 and Figure 13 show another current-controlled embodiment.As Figure 12 and shown in Figure 13, this air flow controller extends along the circumference of disc.Shown device is included between the external diameter of this disc and the internal diameter a plurality of circumference gas channels 194 that are radially spaced that extend along the circumference of disc.In an illustrated embodiment, circumference gas channel 194 is formed by the fin 196 that circumference is radially spaced.Figure 12 shows and is used to comprise disc 104-1, the embodiment of the circumference air flow controller of the disc group of 104-2.As shown in the figure, fin 196-1,196-2 are supported on a base cover 182 and the base bottom 178 gas channel with the lower surface of the upper surface that is formed for disc 104-1 respectively and disc 104-2.Fin 196-3,196-4 are supported on the plate 198 fin with the upper surface of lower surface that is formed for disc 104-1 and disc 104-2.Plate 198 is discoidal, and it is similar to the shape of recording disc 104.Circumference fin 196 provides streamlined gas channel with " division " big whirlpool, the pressure imbalance of minimizing on disc surface, thus reduce the vibration of disc and improve the synchronizing capacity of (raisings) and disc track and reduce pressure and velocity perturbation on the actuating arm that acts on suspension assembly and support suspender.
The present invention relates to be used for the air flow controller of data-storage system to reduce the vibration that causes by air-flow.In one embodiment, this air flow controller comprises an air-flow door (for example 124), and this air-flow door comprises that a plurality of streamlined gas channels (for example 122) are to be reduced in the flow field turbulent flow along disc surface.In one embodiment, air-flow door (for example 124) is positioned at the upstream of read/write head suspension assembly and/or the downstream of read/write head suspension assembly.In another embodiment, the air-flow Control Component comprises a plurality of circumference gas channels that are radially spaced (for example 194).
Should be understood that, though proposed all feature and advantage of all embodiment of the present invention in the narration in front, and the CONSTRUCTED SPECIFICATION of all embodiment of the present invention and function detail, but these announcements are usefulness in order to demonstrate the invention, aspect details, may change to some extent, the particularly structure of the parts in principle of the invention scope and arrangement, these variations will extend within the whole or gamut of the meaning that the used term of elaboration is made a general reference in the appended claims.For example, under the situation of not leaving the spirit and scope of the present invention, wherein some concrete element can change according to concrete application, but safeguards identical functions simultaneously.Though abovely in addition drive and preferred embodiment be described at disk sheet, but will understanding the content of announcement of the present invention, those skilled in the art also can be applied to other system, for example light or magnetic-photosystem, and they still fall within the spirit and scope of the present invention.
Claims (10)
1. disk drives is characterized in that it comprises:
One base;
At least one disc;
Spindle assemblies, this spindle assemblies is being supported at least one disc rotationally with respect to base, forms an airflow field with the rotation by at least one disc along the surface of this at least one disc;
Reading-writing head assembly, it comprises the suspension assembly of supporting at least one read/write head, it can be positioned over disc surface near;
Gas flow controller, it is supported in along in the airflow field of this disc surface and comprise that a plurality of streamlined gas channels are to reduce the turbulent flow in the airflow field.
2. disk drives as claimed in claim 1 is characterized in that, this gas flow controller be supported in the reading-writing head assembly airflow field air-flow the upstream or be supported in one of the air-flow door in downstream of air-flow of the airflow field of reading-writing head assembly.
3. disk drives as claimed in claim 1, it is characterized in that, this gas flow controller comprises a plurality of air-flow doors, and the air-flow door comprises that an inflow air-flow door flows to the air-flow of reading-writing head assembly and the air-flow that the effluent stream door is evoked by reading-writing head assembly with adjusting with adjusting.
4. disk drives as claimed in claim 1 is characterized in that, a plurality of streamlined gas channels comprise the circumference gas channel that is radially spaced.
5. disk drives as claimed in claim 1, it is characterized in that, this gas flow controller comprises an air-flow door, and this air-flow door has a cellular structure, that forms a plurality of streamlined gas channels and forms a block structure of a plurality of fluid type gas passages or a plurality of pipelines of a plurality of streamlined gas channels of a formation.
6. disk drives as claimed in claim 1 is characterized in that, streamlined gas channel between the entrance and exit of gas channel angulation with the redirected air stream field.
7. disk drives as claimed in claim 6 is characterized in that, streamlined gas channel is inside internal diameter or outside external diameter passage at angle towards this at least one disc towards this at least one disc.
8. in combination,
The spindle assemblies that at least one disc rotatably is coupled in a base supports, and this at least one disc is rotatable, and owing to the rotation of this at least one disc produces, along the airflow field of this disc surface;
Airflow apparatus is placed in the airflow field, and comprises that a plurality of streamlined passages are to reduce the turbulent flow in the airflow field.
9. combination as claimed in claim 8 is characterized in that in the air-flow door that a plurality of streamlined gas channels comprise a plurality of circumference gas channels that are radially spaced or comprise a plurality of streamlined gas channels.
10. combination as claimed in claim 8 is characterized in that, streamlined tunnel-shaped is angled with the redirected air stream field.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2001/019051 WO2001097221A2 (en) | 2000-06-14 | 2001-06-14 | Drive level flow-field conditioning to reduce flow field turbulence |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1526137A true CN1526137A (en) | 2004-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA018112293A Pending CN1526137A (en) | 2001-06-14 | 2001-06-14 | Drive level flow-field conditioning to reduce flow field turbulence |
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| CN (1) | CN1526137A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1905055B (en) * | 2005-07-27 | 2010-08-04 | 索尼株式会社 | Disk apparatus |
-
2001
- 2001-06-14 CN CNA018112293A patent/CN1526137A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1905055B (en) * | 2005-07-27 | 2010-08-04 | 索尼株式会社 | Disk apparatus |
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